Molecular Beam Studies of Collisions and Reactions at the Gas-Liquid Interface

气液界面碰撞和反应的分子束研究

• 批准号: 9417909
• 负责人: Gilbert Nathanson
• 金额: $ 37.3万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-15 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417909&HistoricalAwards=false
• 关键词: Molecular; Beam; Studies; Collisions; Reactions

In this project in the Physical Chemistry program of the Chemistry Division, Prof. Gilbert Nathanson of the Chemistry Department of the University of Wisconsin in Madison will continue his researches on the interactions between gases and liquids, these ranging from repulsive collisions to trapping and solvation. Three sets of experiments will be conducted: 1. paraffin, olefin, and aromatic liquids will be bombarded by hydrocarbon gases in order to learn how changes in the structure and bonding of liquid phase molecules govern surface corrugation and gas-liquid energy transfer; 2. inert gas atoms will bombard the surfaces of liquid metals indium and gallium and the In/Ga eutectic alloy to examine the roles played by surface and sub-surface atoms in absorbing the impact energy; 3. gaseous water, ammonia, short chain alcohols, and hydrogen chloride will bombard a sulfuric acid surface to map out the scattering from, and solvation in, sulfuric acid as function of impact angle and collision energy. Mass spectroscopy and time-of-flight velocity analysis will be used to monitor the identity, translational energy, and direction of scattered products. There is little experimental work being done probing the liquid interfaces at the molecular length scales. This research has a high probability of exposing new phenomena and discovering new aspects of gas-surface interaction mechanisms. The techniques employed in this research were developed by the principal investigator. The results of this research will have bearing on other areas of physical chemistry such as nucleation, vaporization, chemical reactions at surfaces, polymer physics, and atmospheric chemistry involving aerosol particles.

在这个项目中的物理化学程序的化学 司，吉尔伯特内桑森教授的化学系的 位于麦迪逊的威斯康星州大学将继续他对 气体和液体之间的相互作用，从排斥 碰撞到捕获和溶剂化。 三组实验将在 进行：1.石蜡、烯烃和芳族液体将被轰击 通过碳氢化合物气体，以了解结构的变化， 液相分子的键合控制着表面张力， 气液能量传递; 2.惰性气体原子会轰击表面 液态金属铟和镓以及In/Ga共晶合金， 研究表面和次表面原子在吸收中所起的作用， 冲击能量; 3.气态水、氨、短链醇，以及 氯化氢会轰击硫酸表面， 硫酸中的散射和溶剂化作为冲击的函数 角度和碰撞能量。 质谱和飞行时间 速度分析将用于监测身份，平移 能量和分散产品的方向。 几乎没有什么实验性的工作在探测这种液体 在分子长度尺度上的界面。 这项研究具有很高的 揭露新现象和发现新方面的可能性 气体-表面相互作用机制 在此过程中使用的技术 研究由首席研究员进行。 的结果 这项研究将对物理化学的其他领域产生影响， 如成核、汽化、表面化学反应、聚合物 物理学和涉及气溶胶粒子的大气化学。